TI technology extends flight time and battery life of quadcopters and industrial drones

Beijing, February 13, 2017 — Texas Instruments (TI) recently introduced two circuit-based subsystem reference designs to help manufacturers extend the flight of quadcopters and other non-military consumer and industrial drones Time and battery life, mainly for parcel delivery and remote monitoring, communication and assistance.

Stelios Kotakis, senior analyst for data transmission and management services at IHS Markit, said: "Time-of-flight has always been the biggest design challenge for recreational quadcopters and professional drones, especially for those used by companies for over-the-horizon operation. This is especially true for aircraft. The courier company wants the drone to have longer battery life and is conducting tests to test the drone to determine the drone's use." A recent study by IHS Markit Display *, flying under ideal conditions without additional load, nearly 50% of the drones on the market have an expected battery life of less than 30 minutes, 35% of the drones have a flight time of 31 to 60 minutes, and the remaining 15% and less The flight time of the drone can exceed one hour.

Breakthrough battery management design

TI's 2S1P Battery Management System (BMS) reference design converts the drone battery pack into an intelligent diagnostic black box recorder that accurately monitors the remaining charge and protects the lithium-ion battery throughout its life cycle. Designers can use the drone BMS reference design to add measurement, protection, balancing, and charging capabilities to any existing drone design and extend flight time. Using the bq4050 multi-cell lithium-ion fuel gauge to accurately measure the remaining battery life, the design also uses the bq24600 battery charge controller and high efficiency DC/DC converter for high efficiency power conversion.

Texas Instruments bq24600 battery charge controller

High speed performance for high efficiency motors

Another obstacle to extending flight time is the low efficiency of the UAV propeller. TI's new reference design for the Unmanned Electronic Governor (ESC) will help manufacturers develop longer, smoother and more stable drones. For unmanned aircraft non-inductive FOC high-speed electronic governor reference design helps to improve the efficiency of the electronic governor, the maximum speed can reach more than 12,000 rpm (" 1.2kHz electric), including fast reverse function, Improve the stability of the tumbling motion.

The design uses TI's C2000TM MCU InstaSPIN-FOCTM solution, including the F28027F microcontroller for motor precision control and FASTTM magnetic field observer proprietary software algorithm for predicting rotor flux, corner, speed and torque. . Motor parameter information is used to adjust the current control bandwidth. Unlike other technologies, the FAST sensorless observer algorithm is fully self-tuning, allowing for proper operation and propeller control without adjustment. The design also includes a 60 V LMR16006 SIMPLE SWITCHER® DC/DC converter with ultra-low quiescent current to effectively manage the lithium polymer (LiPo) battery of the drone.

Learn more about TI and UAV subsystem design features:

· Get ​​more information on analog and embedded processors designed for TI UAV subsystems.

· Download the reference design from TI's reference design library.

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